JPS54127322A - Zoom lens - Google Patents

Zoom lens

Info

Publication number
JPS54127322A
JPS54127322A JP3523678A JP3523678A JPS54127322A JP S54127322 A JPS54127322 A JP S54127322A JP 3523678 A JP3523678 A JP 3523678A JP 3523678 A JP3523678 A JP 3523678A JP S54127322 A JPS54127322 A JP S54127322A
Authority
JP
Japan
Prior art keywords
lens
group
iii
thru
object side
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3523678A
Other languages
Japanese (ja)
Other versions
JPS6140970B2 (en
Inventor
Kazuo Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP3523678A priority Critical patent/JPS54127322A/en
Priority to US06/022,331 priority patent/US4281906A/en
Priority to FR7907571A priority patent/FR2421401A1/en
Priority to DE19792911794 priority patent/DE2911794A1/en
Priority to GB7910555A priority patent/GB2021799B/en
Publication of JPS54127322A publication Critical patent/JPS54127322A/en
Publication of JPS6140970B2 publication Critical patent/JPS6140970B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
    • G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
    • G02B15/17—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +--

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

PURPOSE: To provide a miniature and high zoom lens of well corrected various aberrations by forming the optical system with a focusing 1st group, zooming 2nd, 3rd groups and stationary 4th group and satisfying specified conditions.
CONSTITUTION: The 1st group lens I of positive power is constituted by a negative and three positive, total four lenses 1 thru 4 and the sum P of the powers of each face of the lens 1 and the object side face of the lens 2 is so arranged as to satisfy the conditions of formula III. The group II is constituted by a negative meniscus lens 5 which is convex on the object side, biconcave lens 5, biconcave lens 6 and biconcave and biconvex cemented lenses 7, 8. The focal lengths f1 thru f3 of the respective groups I thru III are let to satisfy the conditions of formulas I, III. At the zooming, the group II of respectively negative powers is moved to the image plane side and the group III is moved to the object side, then the zoom lens of the type whose various aberrations, particularly Petzval sum, are well corrected is provided. Here, fT denotes the focal length of the entire system and FT the maximum aperture ratio at the telescope end.
COPYRIGHT: (C)1979,JPO&Japio
JP3523678A 1978-03-27 1978-03-27 Zoom lens Granted JPS54127322A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP3523678A JPS54127322A (en) 1978-03-27 1978-03-27 Zoom lens
US06/022,331 US4281906A (en) 1978-03-27 1979-03-20 Zoom lens
FR7907571A FR2421401A1 (en) 1978-03-27 1979-03-26 VARIABLE FOCAL OBJECTIVE
DE19792911794 DE2911794A1 (en) 1978-03-27 1979-03-26 ZOOM LENS
GB7910555A GB2021799B (en) 1978-03-27 1979-03-27 Zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3523678A JPS54127322A (en) 1978-03-27 1978-03-27 Zoom lens

Publications (2)

Publication Number Publication Date
JPS54127322A true JPS54127322A (en) 1979-10-03
JPS6140970B2 JPS6140970B2 (en) 1986-09-12

Family

ID=12436198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3523678A Granted JPS54127322A (en) 1978-03-27 1978-03-27 Zoom lens

Country Status (5)

Country Link
US (1) US4281906A (en)
JP (1) JPS54127322A (en)
DE (1) DE2911794A1 (en)
FR (1) FR2421401A1 (en)
GB (1) GB2021799B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735822A (en) * 1980-08-14 1982-02-26 Canon Inc Zoom lens
JPS60208723A (en) * 1984-04-02 1985-10-21 Canon Inc Fast zoom lens of high variable power
US5583700A (en) * 1993-03-31 1996-12-10 Canon Kabushiki Kaisha Zoom lens
US5995296A (en) * 1997-07-25 1999-11-30 Canon Kabushiki Kaisha Zoom lens
US5995297A (en) * 1997-07-24 1999-11-30 Canon Kabushiki Kaisha Zoom lens
US6084721A (en) * 1997-12-01 2000-07-04 Canon Kabushiki Kaisha Zoom lens

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466785A1 (en) * 1979-09-28 1981-04-10 Philips Nv VARIABLE FOCAL OBJECTIVE FOLLOWING LARGE REPORTS COMPRISING ASPHERIC SURFACES
JPS57122413A (en) * 1981-01-22 1982-07-30 Canon Inc Zoom lens
JPH0617938B2 (en) * 1982-08-16 1994-03-09 オリンパス光学工業株式会社 Zoom lens
JPS6011813A (en) * 1983-06-30 1985-01-22 Nippon Kogaku Kk <Nikon> Zoom lens
JPH0668574B2 (en) * 1984-06-27 1994-08-31 オリンパス光学工業株式会社 Large aperture variable magnification lens system
US4948239A (en) * 1989-06-19 1990-08-14 Eastman Kodak Company Zoom lens
JP3088112B2 (en) * 1990-10-12 2000-09-18 旭光学工業株式会社 Zoom lens
JPH08136805A (en) * 1994-11-14 1996-05-31 Nikon Corp Zoom lens
JPH08184758A (en) * 1995-01-05 1996-07-16 Nikon Corp Zoom lens
US6243212B1 (en) 1999-07-30 2001-06-05 Amarel Precision Instruments, Inc. Telecentric zoom lens
JP2010054722A (en) * 2008-08-27 2010-03-11 Olympus Imaging Corp Zoom lens and imaging apparatus
US8305693B1 (en) * 2011-04-25 2012-11-06 Zoom Precision Optical Electronic Co., Ltd. Zoom lens system with wide angle of view
DE102012205601A1 (en) 2012-04-04 2013-10-10 Carl Zeiss Meditec Ag Optical system e.g. terrestrial telescope for terrestrial observation of object in e.g. sport region, has lens that is provided with optical units which are displaced along optical axis for magnification of image of object
CN103048775B (en) * 2013-01-21 2015-04-29 凤凰光学(广东)有限公司 Zoom optical system
CN105676434B (en) * 2016-04-27 2018-08-21 佛山华国光学器材有限公司 A kind of big variable-power optical systems of Penetrating Fog 60X

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4990148A (en) * 1972-12-27 1974-08-28
JPS4996741A (en) * 1973-01-18 1974-09-12
JPS516564A (en) * 1974-07-04 1976-01-20 Fuji Photo Optical Co Ltd Zuumurenzu

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1011753A (en) * 1962-08-03 1965-12-01 Rudolph Rodenstock Optical system with variable focal length
DE1447293A1 (en) * 1964-08-20 1969-05-08 Zeiss Carl Fa Photographic lens with adjustable focal length
US3609005A (en) * 1968-10-08 1971-09-28 Nippon Kogaku Kk Varifocal optical system for zoom lens having ultra-high zoom ratio
DE2204553A1 (en) * 1972-02-01 1973-08-09 Schneider Co Optische Werke LIGHTNESS LENS WITH CHANGEABLE FOCAL LENGTH
JPS492548A (en) * 1972-04-18 1974-01-10
US4015895A (en) * 1973-01-18 1977-04-05 Canon Kabushiki Kaisha Zoom lens system having enlarged range of variation in magnification
JPS524461B2 (en) * 1973-03-23 1977-02-04
JPS594685B2 (en) * 1975-11-05 1984-01-31 キヤノン株式会社 compact nazum lens
JPS52113753A (en) * 1976-03-19 1977-09-24 Canon Inc Zoom lens capable of simply changing variable focal length range

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4990148A (en) * 1972-12-27 1974-08-28
JPS4996741A (en) * 1973-01-18 1974-09-12
JPS516564A (en) * 1974-07-04 1976-01-20 Fuji Photo Optical Co Ltd Zuumurenzu

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735822A (en) * 1980-08-14 1982-02-26 Canon Inc Zoom lens
JPS60208723A (en) * 1984-04-02 1985-10-21 Canon Inc Fast zoom lens of high variable power
US5583700A (en) * 1993-03-31 1996-12-10 Canon Kabushiki Kaisha Zoom lens
US5751497A (en) * 1993-03-31 1998-05-12 Canon Kabushiki Kaisha Zoom lens
US5995297A (en) * 1997-07-24 1999-11-30 Canon Kabushiki Kaisha Zoom lens
US5995296A (en) * 1997-07-25 1999-11-30 Canon Kabushiki Kaisha Zoom lens
US6084721A (en) * 1997-12-01 2000-07-04 Canon Kabushiki Kaisha Zoom lens

Also Published As

Publication number Publication date
FR2421401A1 (en) 1979-10-26
DE2911794C2 (en) 1992-03-05
US4281906A (en) 1981-08-04
FR2421401B1 (en) 1984-02-24
GB2021799B (en) 1982-07-07
DE2911794A1 (en) 1979-10-04
JPS6140970B2 (en) 1986-09-12
GB2021799A (en) 1979-12-05

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